Side beam assembly, bogie and rail vehicle

Abstract

This application provides a side beam assembly, a bogie, and a rail vehicle. The side beam assembly includes: a side beam comprising an upper side beam plate, a lower side beam plate, and a side beam web. The lower side beam plate is shorter than the upper side beam plate and is located below the middle of the upper side beam plate. The side beam web is vertically connected between the upper and lower side beam plates, and a preset distance is left between the side edges of the side beam web and the upper side beam plate. A swing arm positioning seat includes: two connecting arms arranged opposite each other; the ends of the two connecting arms on the same side are connected together as a joint, and the side of the joint is connected to the end of the side beam web; the top of the connecting arms and the top of the joint are connected to the upper side beam plate, the bottom of the joint is connected to the lower side beam plate, and the bottom of the connecting arms is connected to the lower side beam plate. The side beam assembly, bogie, and rail vehicle provided by this application can achieve lightweight design, and the swing arm positioning seat can be adapted to an "I"-shaped bogie.

Description

Technical Field

[0001] This application relates to rail vehicle technology, and more particularly to a side beam assembly, bogie, and rail vehicle. Background Technology

[0002] In recent years, the railway sector has vigorously promoted the development of green transportation, making "carbon reduction" and "emission reduction" the primary prerequisites for railway construction and development, providing people with low-carbon, green, and convenient travel options. To meet the green and low-carbon demands of rail transit, reducing vehicle weight is crucial. The bogie is one of the most important components of a rail vehicle, accounting for 25%-40% of the total vehicle weight. Therefore, lightweight bogie design makes a significant contribution to rail vehicle development, and in recent years, lightweight bogie design has become an important research and development direction within the rail vehicle industry.

[0003] Some manufacturers have made a series of improvements to lightweight bogies. Most of the improvements focus on frame materials (such as using carbon fiber, titanium alloy, magnesium alloy, etc.) and reducing the number of parts. Some have also made improvements to the frame structure, such as using bogies with built-in axle boxes. A few manufacturers have also set the side beams of the bogies to an I-beam structure.

[0004] The bottom of the side beam is equipped with a swing arm positioning seat for connecting the swing arm type axle box. For traditional box-type side beams, the two-piece structure of the swing arm positioning seat cannot be applied to I-shaped side beams, and the connection strength does not meet the design requirements.

[0005] In addition, through practical experience in the industry, technicians have found that because the side beam has at least three curved sections, the bending process of the I-shaped side beam is very difficult to achieve. On the one hand, it is difficult to improve manufacturing efficiency, and on the other hand, it is difficult to obtain a qualified yield, thus making it difficult to promote production. Summary of the Invention

[0006] To address one of the aforementioned technical deficiencies, this application provides a side beam assembly, a bogie, and a rail vehicle.

[0007] According to a first aspect of the embodiments of this application, a side beam assembly is provided, comprising: The side beam includes: an upper side beam plate, a lower side beam plate, and a side beam web plate. The length of the lower side beam plate is less than that of the upper side beam plate. The lower side beam plate is located below the middle of the upper side beam plate. The side beam web plate is vertically connected between the upper side beam plate and the lower side beam plate. A preset distance is left between the side beam web plate and the two sides of the upper side beam plate. The boom positioning seat includes: two connecting arms; the two connecting arms are arranged opposite each other, with space between them to accommodate the bogie axle box boom; the ends of the two connecting arms on the same side are connected together as a joint, and the side of the joint is connected to the end of the side beam web; the top of the connecting arm and the top of the joint are connected to the upper side beam, the bottom of the joint is connected to the lower side beam, and the bottom part of the connecting arm is connected to the lower side beam.

[0008] According to a second aspect of the embodiments of this application, a bogie is provided, including: a side beam as described above.

[0009] According to a third aspect of the embodiments of this application, a rail vehicle is provided, including: a bogie as described above.

[0010] The technical solution provided in this embodiment uses a side beam comprising: an upper side beam plate, a lower side beam plate, and a side beam web plate. The length of the lower side beam plate is less than that of the upper side beam plate. The lower side beam plate is located below the middle of the upper side beam plate. The side beam web plate is vertically connected between the upper and lower side beam plates. A preset distance is left between the side beam web plate and the two sides of the upper side beam plate. The swing arm positioning seat comprises: two connecting arms. The two connecting arms are arranged opposite each other, with space between them to accommodate the bogie axle box swing arm. The ends of the two connecting arms on the same side are connected together as a joint. The side of the joint is connected to the end of the side beam web plate. The top of the connecting arm and the top of the joint are connected to the upper side beam plate, the bottom of the joint is connected to the lower side beam plate, and the bottom of the connecting arm is connected to the lower side beam plate. This solution not only achieves the effect of lightweight design, but also the connection method between the swing arm positioning seat and the side beam web plate is relatively simple, which can adapt to the "I" shaped cross-section of the side beam and will not cause significant damage to the side beam, thus improving production efficiency and yield. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the bogie side beam assembly provided in an embodiment of this application; Figure 2 This is a front view of the bogie side beam assembly provided in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the rotating arm positioning seat provided in the embodiments of this application; Figure 4 This is a front view of the swing arm positioning seat provided in an embodiment of this application; Figure 5 A top view of the swing arm positioning seat provided in the embodiments of this application; Figure 6This is a schematic diagram of the connection between the swing arm positioning seat and the side beam web provided in an embodiment of this application; Figure 7 This is a schematic diagram of the structure connecting the swing arm positioning seat and the axle box swing arm provided in the embodiments of this application; Figure 8 An exploded view showing the connection between the swing arm positioning seat and the axle box swing arm provided in an embodiment of this application; Figure 9 A top view of the bogie side beam provided in an embodiment of this application; Figure 10 This is a structural schematic diagram of the upper side beam plate in the side beam provided in an embodiment of this application; Figure 11 This is a schematic diagram of the connection between the upper and lower side beams in a side beam according to an embodiment of this application. Figure 12 This is a schematic diagram of the connection between the upper side beam plate and the side beam flange plate in an embodiment of this application. Figure 13 This is a schematic diagram of the structure of the bogie side beam with the side beam web installed during the assembly process, provided in an embodiment of this application. Figure 14 This is a schematic diagram of the structure of the bogie side beam with the side beam stiffening plate installed during the assembly process, provided in an embodiment of this application. Figure 15 This is a schematic diagram of the structure of the bogie side beam with the upper side beam plate installed during the assembly process, provided in an embodiment of this application. Figure 16 This is a schematic diagram of the structure of the bogie side beam with side beam flange installed during the assembly process, provided in an embodiment of this application. Figure 17 An exploded view of the bogie side beam provided in an embodiment of this application; Figure 18 This is a schematic diagram of the structure of the steering frame provided in the embodiments of this application; Figure 19 A partial view of the braking device installed on the bogie according to an embodiment of this application; Figure 20 Another partial view of the braking device provided in the embodiments of this application, mounted on the bogie; Figure 21 This is a schematic diagram of the brake hanger installed on the side beam according to an embodiment of this application; Figure 22 An exploded view of the brake hanger and side beam installation provided in an embodiment of this application; Figure 23 This is a schematic diagram of the brake hanger provided in an embodiment of this application.

[0012] Figure label: 1-Side beam; 11-Upper side beam plate; 111-Middle plate section; 112-Extension section; 113-First bending section; 114-Second bending section; 12-Lower side beam plate; 13-Side beam web; 14-Side beam flange; 141-Width-changing section; 142-Equal width section; 1421-Transition section; 1422-Connecting section; 15-Side beam vertical plate; 16-Side beam middle stiffener plate; 17-First-stage cap plate; 18-First-stage cover plate; 2-Crossbeam; 3-Rotating arm positioning seat; 31-Connecting arm; 311-Mounting platform; 312-Through hole; 313-Notch; 314-First connecting section; 315-Second connecting section; 32-Joint; 33-Supporting member; 331-Protrusion; 41-Brake hanger; 411-Side beam connecting seat; 412-Hanger body; 413-Lifting part; 42-External mounting seat; 43-Internal mounting seat; 431-Positioning groove; 44-Brake caliper; 45-Equipment installation part; 46-Tread cleaner; 91-Shaft box swing arm; 92-Swing arm node; 921-Shaft end protrusion. Detailed Implementation

[0013] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0014] A manufacturer designed a cylindrical swing arm positioning seat for the side beam with an "I"-shaped cross-section. The swing arm joint is press-fitted to the side beam before being connected to the axle box swing arm. Because the joint press-fit is an interference fit, and the parallelism and perpendicularity between the joint and the axle box are strictly regulated, it is difficult to guarantee the accuracy of the press-fit on the side beam, thus affecting the bogie's performance. Furthermore, the joint is a rubber part that needs to be lifted for replacement. Frequent unloading and re-press-fitting can cause strain on the side beam itself, affecting its service life. Moreover, once damaged, it must be scrapped, resulting in significant waste. Moreover, the press-fit method is not suitable for current vehicle assembly and maintenance methods, requiring specialized assembly tooling and equipment, leading to high production costs.

[0015] This embodiment provides a side beam assembly for a bogie, applicable to rail vehicles. As a crucial component of the bogie frame, the side beam has an "I"-shaped cross-section, resulting in a lighter weight and enabling lightweight design, thus reducing the overall vehicle weight. Furthermore, this embodiment also provides a swing arm positioning seat that can accommodate the "I"-shaped side beam and does not suffer from the aforementioned technical drawbacks.

[0016] The rail vehicle can be a high-speed train, a subway vehicle, a light rail vehicle, or other vehicles that can run on rails.

[0017] In this embodiment, the direction of travel of the rail vehicle is referred to as longitudinal, the direction of track width is referred to as transverse, and the direction of car height is referred to as vertical.

[0018] like Figures 1 to 8 As shown, the side beam assembly provided in this embodiment includes: a side beam 1 and a swing arm positioning seat 3. The side beam 1 includes: an upper side beam plate 11, a lower side beam plate 12, and a side beam web plate 13.

[0019] The lower beam plate 12 is shorter than the upper beam plate 11, and the lower beam plate 12 is located below the middle of the upper beam plate 11. The side beam web plate 13 is vertically connected between the upper beam plate 11 and the lower beam plate 12. The side beam web plate 13 and the two sides of the upper beam plate 11 are left with a preset distance so that the cross section of the upper beam plate 11, the lower beam plate 12 and the side beam web plate 13 after connection is "I" shaped.

[0020] The boom positioning seat 3 includes two connecting arms 31. The two connecting arms 31 are arranged opposite each other, with space between them to accommodate the bogie axle box boom 91. The ends of the two connecting arms 31 on the same side are connected together to form a joint 32. The side of the joint 32 protrudes in the direction away from the connecting arms 31 to form a connecting rib, which is connected to the end of the side beam web 13.

[0021] The top end of the connecting arm 31 and the top end of the joint 32 are connected to the upper beam plate 11, the bottom end of the joint 32 is connected to the lower beam plate 12, and the bottom end of the connecting arm 31 is connected to the lower beam plate 12.

[0022] Based on the aforementioned "I"-shaped side beam, the joint 32 in the swing arm positioning seat 3 is connected to the side beam web 13, and the axle box swing arm 91 is inserted between the two connecting arms 31 and connected to the connecting arms 31, thus realizing the connection between the swing arm axle box and the side beam.

[0023] Because the side beam has an "I"-shaped cross-section, while meeting the vertical load-bearing capacity requirements, the number of components in the side beam can be reduced, thereby lowering its weight and achieving lightweight design. It also reduces weld length and welding frequency, thus improving production efficiency. Furthermore, the swing arm positioning seat with this structure can be directly welded to the side beam web, eliminating the need for press-fitting. This process is simple and quick, and causes minimal damage to the side beam. It also eliminates the need for additional press-fitting fixtures, reducing production costs.

[0024] The technical solution provided in this embodiment uses a side beam comprising: an upper side beam plate, a lower side beam plate, and a side beam web plate. The length of the lower side beam plate is less than that of the upper side beam plate. The lower side beam plate is located below the middle of the upper side beam plate. The side beam web plate is vertically connected between the upper and lower side beam plates. A preset distance is left between the side beam web plate and the two sides of the upper side beam plate. The swing arm positioning seat comprises: two connecting arms. The two connecting arms are arranged opposite each other, with space between them to accommodate the bogie axle box swing arm. The ends of the two connecting arms on the same side are connected together as a joint. The side of the joint is connected to the end of the side beam web plate. The top of the connecting arm and the top of the joint are connected to the upper side beam plate, the bottom of the joint is connected to the lower side beam plate, and the bottom of the connecting arm is connected to the lower side beam plate. This solution not only achieves the effect of lightweight design, but also the connection method between the swing arm positioning seat and the side beam web plate is relatively simple, which can adapt to the "I" shaped cross-section of the side beam and will not cause significant damage to the side beam, thus improving production efficiency and yield.

[0025] Based on the above technical solution, this embodiment provides a detailed description of the implementation method of the rotating arm positioning seat 3.

[0026] The included angle between the two connecting arms 31 is 0°-30°, which enables the force between the frame and the wheelset to be transmitted evenly, and can improve the strength of the side beam and the overall frame, ensuring the support strength.

[0027] The outer side of the connecting arm 31 is provided with a mounting platform 311, the surface of which is flat. At least two through holes 312 penetrating the thickness of the connecting arm are formed on the mounting platform 311. The through holes 312 on the two connecting arms 31 are symmetrically arranged. The axle box rotating arm is inserted between the two connecting arms 31, and a connecting pin is used to sequentially pass through the through hole 312 on the left side of the connecting arm 31, the rotating arm node, and the through hole 312 on the left side of the other connecting arm 31. Another connecting pin is used to sequentially pass through the through hole 312 on the right side of the connecting arm 31, the rotating arm node, and the through hole 312 on the right side of the other connecting arm 31, thus completing the connection between the axle box rotating arm and the rotating arm positioning seat.

[0028] Furthermore, the bottom of the mounting platform 311 may have an upwardly recessed notch 313 for accommodating the elastic node of the axle box swing arm, the notch 313 being located between two through holes 312. The notches 313 on the two connecting arms 31 are symmetrically arranged.

[0029] The axle box swing arm 91 has mounting holes, and the swing arm node 92 is disposed within these mounting holes with an interference fit. The swing arm node 92 is made by vulcanizing metal and rubber. Both axial ends of the swing arm node 92 have shaft end protrusions 921, which are embedded in notches 313 to achieve longitudinal and vertical limiting of the swing arm node 92. The connecting arm 31 itself can provide lateral limiting for the swing arm node 92.

[0030] The cross-section of the aforementioned shaft end protrusion 921 includes an arc and a line segment connecting the two ends of the arc. Correspondingly, the notch 313 is an arc-shaped notch that matches the shape of the shaft end protrusion 921, so that the swing arm node 92 fits against the swing arm positioning seat through the arc surface, ensuring connection accuracy and facilitating force transmission.

[0031] Furthermore, to enhance the vertical limiting and support of the swing arm node 92, a support member 33 is employed. The support member 33 has a protrusion 331 in its center that can be inserted into a notch 313, and connecting holes at both ends. The protrusion 331 of the support member 33 is inserted into the notch 313, and fasteners pass through the connecting holes to connect to the bottom end of the mounting platform 311. Fixing the support member 33 to the bottom end of the mounting platform 311 provides support and limiting for the swing arm node 92 from the bottom, further improving the reliability of the swing arm node 92 connection.

[0032] Based on the above scheme, protrusion 331 is a rectangular protrusion, with the same line segment length as the shaft end of the swing arm node 92. The lateral dimension of protrusion 331 matches the length of the shaft end of the swing arm node 92.

[0033] Based on the above technical solution, the side beam 1 provided in this embodiment further includes: a side beam flange 14 and a side beam upright 15. The side beam flange 14 is located above the end of the upper side beam plate 11; one end of the side beam flange 14 is connected to the end of the upper side beam plate 11, and the other end extends and connects to the middle of the upper side beam plate 11. The side beam upright 15 is vertically connected between the end of the upper side beam plate 11 and the side beam flange 14; a predetermined distance is maintained between the two side edges of the side beam upright 15 and the side beam flange 14.

[0034] The upper beam 11 is divided into a middle section 111 and extension sections 112, a first bending section 113, and a second bending section 114, which are sequentially arranged at both ends of the middle section. The length of the middle section 111 matches that of the lower beam 12; the extension section 112 is at the same height as the middle section 111. Taking the upper surface of the middle part of the upper beam 11 as the reference plane, the distance between the first bending section 113 and the reference plane gradually increases along the direction from the middle part of the upper beam 11 to the end.

[0035] Based on the above scheme, the top of the connecting arm 31 includes a first connecting section 314 and a second connecting section 315, with an obtuse angle between them. The first connecting section 314 is connected to the extension section 112 of the upper beam plate 11, and the second connecting section 315 is connected to the first bent section 113 of the upper beam plate 11. This scheme allows the force to be uniformly transmitted upward and downward along the two connecting arm branches of the swing arm positioning seat to the axle box swing arm.

[0036] The above scheme connects the axle box and the side beam in the wheelset, so that the load between the wheelset and the frame can be transmitted evenly and smoothly, and the Y-shaped swing arm positioning seat 3 has sufficient rigidity to withstand bending stress and shear stress.

[0037] The swing arm positioning seat 3 can be formed by forging. The way the swing arm positioning seat 3 is connected to the end of the side beam web 13 can improve welding accuracy, reduce welding deformation, realize the integrated process of integral forging and welding, and reduce the weld length. Simulation analysis shows that the above-mentioned swing arm positioning seat can improve the strength and rigidity of the frame and achieve a lightweight effect.

[0038] The above solution is compatible with existing axle boxes with swing arms and can be directly applied to existing products. It can improve the standardization and modularity of bogies, reduce production costs, and facilitate assembly and maintenance.

[0039] Based on the above technical solutions, this embodiment also provides a specific implementation method for the side beam: as follows Figure 1 , Figure 2 , Figures 9 to 18 As shown, the bogie side beam provided in this embodiment includes: upper side beam plate 11, lower side beam plate 12, side beam web plate 13, side beam flange plate 14, and side beam upright plate 15, all of which are welded together.

[0040] The upper side beam 11 has a flat plate in the middle, with its ends bent upwards. The upper side beam 11 has an axisymmetric structure, with the axis of symmetry located in the middle of the aforementioned side beam 11 and parallel to the width direction of the upper side beam 11. The upper side beam 11 extends longitudinally, and its width direction is transverse.

[0041] The lower beam plate 12 is located below the middle of the upper beam plate 11, parallel to the middle of the upper beam plate 11 and spaced apart from it. The side beam web plate 13 is vertically connected between the middle of the upper beam plate 11 and the lower beam plate 12. The side beam web plate 13 and the two sides of the upper beam plate 11 are left with a predetermined distance, which means that the cross-section of the upper beam plate 11, the lower beam plate 12, and the side beam web plate 13 is "I" shaped. The side beam web plate 13 is the main component that bears the vertical force.

[0042] The side beam flange 14 is located above the end of the upper side beam plate 11, and the side beam flange 14 and the upper side beam plate 11 are also arranged opposite each other with a certain distance between them. One end of the side beam flange 14 is connected to the end of the upper side beam plate 11, and the other end extends and connects to the middle of the upper side beam plate 11. Taking the upper surface of the middle part of the upper side beam plate 11 as the reference plane, the distance between the side beam flange 14 and the reference plane gradually increases along the direction from the middle of the upper side beam plate 11 to the end, which is equivalent to the side beam flange 14 being inclined, with its outer end being higher.

[0043] The side beam upright plate 15 is vertically connected between the end of the upper side beam plate 11 and the side beam flange 14, with a predetermined distance between the two sides of the side beam upright plate 15 and the side beam flange 14. This means that the cross-section of the side beam flange 14, the upper side beam plate 11, and the side beam upright plate 15 is "I" shaped, and the side beam upright plate 15 is the main component that bears the vertical force.

[0044] Regarding the aforementioned side beam structure, the middle section of the side beam connects to the crossbeam of the bogie, forming the bogie frame. Additionally, both ends of the upper side beam 11 are connected to the primary suspension system, and the bottom end of the primary suspension system is connected to the axle box. The middle section of the upper side beam is connected to the secondary suspension system, and the top of the secondary suspension system is connected to the bottom of the car body. The vertical force transmission path of the vehicle is: car body, secondary suspension system, side beam, primary suspension system, wheelset.

[0045] The side beam with an "I"-shaped cross-section, while meeting the vertical load-bearing capacity requirements, reduces the number of components in the side beam, thereby reducing its weight and achieving lightweight design. Furthermore, the side beam provided in this embodiment consists of two "I"-shaped structures, significantly reducing manufacturing difficulty, facilitating industrialization, improving production efficiency, and increasing yield.

[0046] Furthermore, the use of an "I"-shaped cross-section for the side beams can reduce the torsional stiffness of the bogie, thereby improving the bogie's track adaptability and comfort.

[0047] The upper beam 11 is divided into a middle plate segment 111 and extension segments 112, a first bending segment 113, and a second bending segment 114, which are sequentially arranged at both ends of the middle plate segment 111. The upper beam 11 is an axisymmetric structure, and the structures at both ends are identical.

[0048] The middle plate segment 111 is a horizontal plate. The length of the middle plate segment 111 matches that of the lower beam plate 12, and the lower beam plate 12 is vertically aligned with the middle plate segment 111. The extension segment 112 is at the same height as the middle plate segment 111, which means that the extension segment 112 continues to extend horizontally outward from the outer end of the middle plate segment 111.

[0049] Using the upper surface of the middle section of the upper side beam plate 11 as the reference plane, the distance between the first bending segment 113 and the reference plane gradually increases along the direction from the middle to the end of the upper side beam plate 11, which is equivalent to the first bending segment 113 tilting upward. The first bending segment 113 and the extension segment 112 are smoothly transitioned by a curve. The angle between the first bending segment 113 and the reference plane is 135°-165°.

[0050] The second bending segment 114 bends upward at a larger angle, with its angle to the vertical less than 5°, approximating the vertical. The second bending segment 114 and the first bending segment 113 transition smoothly through a curve.

[0051] The inner end of the side beam flange 14 extends to connect with the middle plate section 111 of the upper side beam plate 11, and its outer end connects to the second bent section 114. The side beam flange 14 includes a widening section 141 and a constant-width section 142, the width of which remains constant. The width of the widening section 141 varies, specifically decreasing from the middle of the side beam towards the end. The widest end of the widening section 141 connects to the middle plate section 111.

[0052] The constant-width section 142 includes a transition section 1421 and a connecting section 1422. The transition section 1421 is located between the variable-width section 141 and the connecting section 1422. The transition section 1421 and the variable-width section 141 are coplanar, and their inclination patterns are consistent. The connecting section 1422 extends approximately horizontally, and the connecting section 1422 and the transition section 1421 are smoothly transitioned by a curve, with an obtuse angle between them, for example, 120°-170°.

[0053] Based on the above technical solution, a side beam stiffening plate 16 is also adopted, which is vertically connected to both sides of the side beam web 13. The top of the side beam stiffening plate 16 is connected to the middle of the upper side beam plate 11, and the bottom of the side beam stiffening plate 16 is connected to the lower side beam plate 12. There are multiple side beam stiffening plates 16, which are arranged at intervals along the longitudinal direction. The height dimension of the side beam stiffening plate 16 is the same as that of the side beam web 13, and the width dimension can be set according to the shape of the upper side beam plate 11 and the lower side beam plate 12. For example, a wider side beam stiffening plate 16 can be set at a wider position of the upper side beam plate 11 to improve the support capacity of the upper side beam plate 11, improve the connection strength and the reliability of vertical force bearing.

[0054] Based on the above technical solution, a first-stage cap tube upright plate 17 is provided at the end of the upper beam plate 11. One end of the first-stage cap tube upright plate 17 is connected to the outer surface of the end of the upper beam plate 11, and the other end branches into two cylindrical upright plates. The two cylindrical upright plates form a cylindrical shape, and the interior is used to accommodate the first-stage suspension device.

[0055] Correspondingly, the end of the side beam flange 14 is also provided with a primary suspension cover 18. The shape of the primary suspension cover 18 matches the shape of the primary suspension cap plate 17 and is connected to the top of the primary suspension cap plate 17. The top of the primary suspension device is mounted on the primary suspension cover 18. The primary suspension cover 18 is also provided with positioning holes for positioning the primary suspension device. The side beam flange 14 and the primary suspension cover 18 can be an integral structure, formed from a single steel plate, thereby reducing welding steps, reducing welding deformation, improving finished product quality, and reducing production costs.

[0056] The top of the swing arm positioning seat 3 is connected to the end of the upper beam plate 11, specifically to the extension section 112 and the first bending section 113. The swing arm positioning seat 3 is used to connect the node end of the axle box, and the other end of the axle box is connected to the bearing in the wheelset assembly. The swing arm type axle box can limit the lateral relative movement between the frame and the wheelset, avoiding large lateral relative displacement between the two.

[0057] The assembly process of the aforementioned side beams is as follows: First step, as... Figure 13 As shown, the swing arm positioning seat 3 is welded to both ends of the side beam web 13, and then the side beam web 13 is welded to the upper surface of the lower side beam plate 12. The second step is as follows... Figure 14 As shown, side beam stiffening plates 16 are welded to both sides of the side beam web 13, and the bottom end of the side beam stiffening plates 16 is also welded to the lower side beam plate 12. The third step is as follows... Figure 15 As shown, the upper side beam plate 11 is welded to the top of the side beam web plate 13. Fourth step, as... Figure 16 As shown, the two side beam uprights 15 are welded to the corresponding positions of the upper side beam plate 11, and then the two side beam flanges 14 are welded to the top of the side beam uprights 15 and correspondingly welded to the upper side beam plate 11. In addition, the primary cap plate 1 and the primary cover plate 18 are also welded to them.

[0058] like Figure 18 As shown, this embodiment also provides a bogie, employing the side beam 1 provided in any of the above descriptions. A crossbeam 2 connects the two side beams 1 to form the bogie frame. A hole is opened in the middle of the crossbeam 2 for mounting a traction center pin. The top of the traction center pin is connected to the car body. The transmission path of traction and braking force between the vehicle and the bogie is: car body, traction center pin, frame, wheelset.

[0059] Traditional bogie frames are typically box-girder structures, with the brake hangers welded to the inner vertical plates of the frame. This occupies a significant amount of space, and their position is not adjustable once welded in place. Furthermore, the surface of the inner vertical plate where the brake hangers are welded experiences substantial welding stress and deformation, affecting the installation accuracy of the brake hangers and making them prone to fatigue cracks after long-term operation, thus reducing the reliability of the bogie. Moreover, to compensate for the impact of welding stress on structural strength, the plate thickness at the junction of the hanger and the frame needs to be appropriately increased, adding extra weight to the bogie and hindering lightweight design.

[0060] To address the aforementioned problems, this embodiment, based on the structure of the side beam described above, also provides an implementation method for the braking device, such as... Figures 19 to 23As shown, the braking device includes: a brake hanger 41, an outer mounting base 42, an inner mounting base 43, and a brake caliper. The outer mounting base 42 is located on the outer side of the side beam upright plate 15. Since the side beam upright plate 15, the side beam flange 14, and the upper side beam plate 11 form a recessed structure, the outer mounting base 42 is essentially embedded into the recessed structure on the outer side of the side beam. The outer mounting base 42 can be a plate-like structure with connecting holes.

[0061] The inner mounting base 43 is located on the inner side of the side beam upright plate 15, which is equivalent to being embedded in the recessed structure inside the side beam. The inner mounting base 43 can also be a plate-shaped structure with connecting holes.

[0062] The brake hanger 41 is located on the inner side of the side beam, and the brake hanger 41 also has connecting holes. By passing fasteners through the connecting holes of each component, the brake hanger 41, the inner mounting base 43, the side beam upright plate 15, and the outer mounting base 42 are connected in sequence to realize the installation of the brake hanger 41 and the side beam.

[0063] The brake caliper is installed on the brake hanger 41. The brake caliper can be a structure corresponding to tread brakes or a structure corresponding to disc brakes.

[0064] The aforementioned brake hanger is installed on the side beam using fasteners instead of welding, thus eliminating the problems of welding deformation and fatigue cracks caused by welding, thereby improving the reliability of the bogie.

[0065] In addition, the aforementioned brake hanger can utilize the recessed space inside the side beam to reduce the distance between the brake hanger and the side beam, thereby reducing the space occupied by the braking device, making the structure more compact and reducing the difficulty of the position layout of each component.

[0066] The inner mounting base 43 has an inwardly recessed surface facing away from the side beam upright plate 15, forming a positioning groove 431. Correspondingly, a positioning protrusion is provided on the surface of the brake hanger 41 facing the inner mounting base 43. The positioning protrusion is embedded in the positioning groove 431 and can move within the positioning groove. During the installation of the brake hanger 41, the position of the brake caliper can be adjusted by moving the positioning protrusion within the positioning groove 431, moving the brake caliper to the target position. Especially for tread brakes, after a period of operation, the brake shoes wear and become thinner. The brake caliper can be moved closer to the wheel tread by moving the brake hanger 41 to meet braking requirements.

[0067] Alternatively, the position of the brake hanger 41 can be adjusted by moving the positioning protrusion within the positioning groove 431, thereby eliminating dimensional errors of various components, improving the fault tolerance rate, and ensuring production cycle time.

[0068] One embodiment is as follows: the positioning groove 431 extends in a direction parallel to the side beam flange 14, and both ends of the positioning groove 431 penetrate through both sides of the inner mounting base 43. The positioning groove 431 moves and adjusts its position along the extending direction of the side beam flange 14.

[0069] There is one inner mounting base 43, with four connecting holes. The position and size of the connecting holes correspond to the connecting holes on the side beam upright plate 15. Alternatively, there are two inner mounting bases 43, spaced apart along the extension direction of the side beam flange 14. Each inner mounting base 43 has two connecting holes, and the position and size of the connecting holes on the two inner mounting bases 43 correspond to the connecting holes on the side beam upright plate 15.

[0070] The advantage of having two inner mounting seats 43 is that the component size is smaller, making it easier to assemble in confined spaces. Furthermore, the distance between the two inner mounting seats 43 is adjustable, which can be adjusted according to the connection hole position of the side beam upright plate 15, thus solving the problem of component opening size errors and improving the tolerance for errors.

[0071] The inner mounting base 43 can be pre-welded to the side beam upright plate 15. For example, the back of the inner mounting base 43 is welded to the side beam upright plate 15, the top is welded to the side beam wing plate 14, and the bottom is welded to the upper side beam plate 11 for fixation.

[0072] Alternatively, the inner mounting base 43 may be fixed to the side beam upright plate 15 by fasteners during the installation of the brake hanger 41.

[0073] One embodiment is as follows: the inner mounting plate 43 has two connecting holes distributed on both sides of the positioning groove 431. The outer mounting plate 42 has corresponding connecting holes to be connected to the inner mounting plate 43 by fasteners.

[0074] The brake hanger 41 includes a side beam connecting seat 411, a hanger body 412, and a lifting part 413. One surface of the side beam connecting seat 411 is used to fit against and connect to the surface of the inner mounting seat 43. The hanger body 412 is disposed on the other surface of the side beam connecting seat 411 and extends in a direction perpendicular to the side beam upright plate 15. Two lifting parts 413 are spaced apart from the hanger body 412 and are used to connect brake calipers 44.

[0075] The lifting section 413 extends toward the wheel, and the brake caliper 44 is bolted to the bottom of the lifting section 413.

[0076] Furthermore, the braking device also includes an equipment connection part 45, which is located in the middle of the main body part 412 of the hanger. The equipment connection part 45 is a plate-shaped structure with connection holes for mounting the tread cleaner 46.

[0077] This embodiment also provides a bogie, employing the side beam 1 provided in any of the above descriptions. A crossbeam 2 connects the two side beams 1 to form the bogie frame. A hole is opened in the middle of the crossbeam 1 for mounting a traction center pin. The top of the traction center pin is connected to the car body. The transmission path of traction and braking forces between the vehicle and the bogie is: car body, traction center pin, frame, wheelset.

[0078] Based on the above solution, this embodiment also provides a rail vehicle that uses the aforementioned bogie, which is mounted at the bottom of the car. The bogie and rail vehicle provided in this embodiment have the same technical effects as the aforementioned side beam.

Claims

1. A side beam assembly, characterized in that, include: The side beam includes: an upper side beam plate, a lower side beam plate, and a side beam web plate. The length of the lower side beam plate is less than that of the upper side beam plate. The lower side beam plate is located below the middle of the upper side beam plate. The side beam web plate is vertically connected between the upper side beam plate and the lower side beam plate. A preset distance is left between the side beam web plate and the two sides of the upper side beam plate. The boom positioning seat includes: two connecting arms; the two connecting arms are arranged opposite each other, with space between them to accommodate the bogie axle box boom; the ends of the two connecting arms on the same side are connected together as a joint, and the side of the joint is connected to the end of the side beam web; the top of the connecting arm and the top of the joint are connected to the upper side beam, the bottom of the joint is connected to the lower side beam, and the bottom part of the connecting arm is connected to the lower side beam.

2. The side beam assembly according to claim 1, characterized in that, The outer side of the connecting arm is provided with a mounting platform, and at least two through holes penetrating the thickness of the connecting arm are opened on the mounting platform; the through holes on the two connecting arms are symmetrically arranged.

3. The side beam assembly according to claim 2, characterized in that, The bottom of the mounting platform has an upwardly recessed notch for accommodating the axle box swing arm node, and the notch is located between two through holes; the notches on the two connecting arms are symmetrically arranged.

4. The side beam assembly according to claim 3, characterized in that, Also includes: Support component; The support has a protrusion in the middle that can be inserted into a notch, and connecting holes at both ends of the support. The protrusion of the support is inserted into the notch and connected to the bottom of the mounting platform by fasteners passing through the connecting holes.

5. The side beam assembly according to claim 4, characterized in that, The bump is a rectangular bump; The cross-section of the shaft end of the swing arm node is an arc shape enclosed by a line segment, and the line segment has the same length as the edge of the protrusion.

6. The side beam assembly according to claim 1, characterized in that, The middle part of the joint protrudes in the direction away from the connecting arm to form a connecting rib for connection with the side beam.

7. The side beam assembly according to claim 1, characterized in that, Also includes: The side beam flange is located above the end of the upper side beam plate; one end of the side beam flange is connected to the end of the upper side beam plate, and the other end extends and is connected to the middle of the upper side beam plate. The side beam upright plate is vertically connected to the end of the upper side beam plate between the side beam flange plate and the side beam upright plate; a preset distance is left between the two sides of the side beam upright plate and the side beam flange plate.

8. The side beam assembly according to claim 7, characterized in that, The upper beam is divided into a middle plate section and extension sections, a first bending section and a second bending section, which are sequentially set at both ends of the middle plate section. The length of the middle plate section matches that of the lower beam plate; the extension section is at the same height as the middle plate section. Using the upper surface of the middle part of the upper side beam as the reference plane, the distance between the first bending section and the reference plane gradually increases along the direction from the middle part of the upper side beam towards the end.

9. The side beam assembly according to claim 8, characterized in that, The top of the connecting arm includes: a first connecting segment and a second connecting segment, which form an obtuse angle; the first connecting segment is connected to the extension segment of the upper beam plate, and the second connecting segment is connected to the first bent segment of the upper beam plate.

10. A bogie, characterized in that, Includes the side beam assembly as described in any one of claims 1-9.

11. A rail vehicle, characterized in that, Includes the bogie as described in claim 10.

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